From the Geoff Plumb Collection of original slides. Brush Type 2 diesel No. D5581 (later class 31 No. 31163) still carries its original livery as it works a passenger train past the signalbox at Stamford with a Peterborough to Leicester train, though as it's carrying a headcode of 1M37 and has quite a lengthy set of coaches, it maybe something more exotic, especially as there are quite a few heads out of windows! Photo taken sometime in the summer of 1964, photographer unknown. From information received - 1M37 was the 09.30 Yarmouth Vauxhall to Derby Midland service, Saturdays Only, 27th June to 5th September 1964. Collect Slide No. 28682.